OS Command Injection in CVS - CVE-2017-12836

Vulnerability identifier: #VU29260

CSH Severity: High

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

CVE-ID: CVE-2017-12836

CWE-ID: CWE-78

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
CVS

Software vendor:
cvshome.org

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation when processing characters in the URL of a remote repository within SSH client.  A remote attacker can trick the victim to use a specially crafted connection URL, inject and execute arbitrary OS commands on the client's system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Cybersecurity Help is currently unaware of any official solution to address this vulnerability..

• http://lists.nongnu.org/archive/html/bug-cvs/2017-08/msg00000.html
• http://www.debian.org/security/2017/dsa-3940
• http://www.openwall.com/lists/oss-security/2017/08/11/1
• http://www.openwall.com/lists/oss-security/2017/08/11/4
• http://www.securityfocus.com/bid/100279
• http://www.ubuntu.com/usn/USN-3399-1
• https://bugzilla.redhat.com/show_bug.cgi?id=1480800
• https://security.gentoo.org/glsa/201709-17